diff options
| -rw-r--r-- | Makefile | 3 | ||||
| -rw-r--r-- | pkg/bindings/images/build.go | 44 | ||||
| -rw-r--r-- | pkg/bindings/images/build_unix.go | 16 | ||||
| -rw-r--r-- | pkg/bindings/images/build_windows.go | 9 | ||||
| -rw-r--r-- | test/system/070-build.bats | 20 |
5 files changed, 80 insertions, 12 deletions
@@ -382,6 +382,9 @@ bin/podman.cross.%: .gopathok .PHONY: local-cross local-cross: $(CROSS_BUILD_TARGETS) ## Cross compile podman binary for multiple architectures +.PHONY: cross +cross: local-cross + # Update nix/nixpkgs.json its latest stable commit .PHONY: nixpkgs nixpkgs: diff --git a/pkg/bindings/images/build.go b/pkg/bindings/images/build.go index f5e7c0c98..b56afbceb 100644 --- a/pkg/bindings/images/build.go +++ b/pkg/bindings/images/build.go @@ -28,6 +28,11 @@ import ( "github.com/sirupsen/logrus" ) +type devino struct { + Dev uint64 + Ino uint64 +} + var ( iidRegex = regexp.MustCompile(`^[0-9a-f]{12}`) ) @@ -402,7 +407,7 @@ func nTar(excludes []string, sources ...string) (io.ReadCloser, error) { defer pw.Close() defer gw.Close() defer tw.Close() - + seen := make(map[devino]string) for _, src := range sources { s, err := filepath.Abs(src) if err != nil { @@ -431,25 +436,40 @@ func nTar(excludes []string, sources ...string) (io.ReadCloser, error) { } if info.Mode().IsRegular() { // add file item - f, lerr := os.Open(path) - if lerr != nil { - return lerr + di, isHardLink := checkHardLink(info) + if err != nil { + return err } - hdr, lerr := tar.FileInfoHeader(info, name) - if lerr != nil { - f.Close() - return lerr + hdr, err := tar.FileInfoHeader(info, "") + if err != nil { + return err + } + orig, ok := seen[di] + if ok { + hdr.Typeflag = tar.TypeLink + hdr.Linkname = orig + hdr.Size = 0 + + return tw.WriteHeader(hdr) + } + f, err := os.Open(path) + if err != nil { + return err } + hdr.Name = name - if lerr := tw.WriteHeader(hdr); lerr != nil { + if err := tw.WriteHeader(hdr); err != nil { f.Close() - return lerr + return err } - _, cerr := io.Copy(tw, f) + _, err = io.Copy(tw, f) f.Close() - return cerr + if err == nil && isHardLink { + seen[di] = name + } + return err } else if info.Mode().IsDir() { // add folders hdr, lerr := tar.FileInfoHeader(info, name) if lerr != nil { diff --git a/pkg/bindings/images/build_unix.go b/pkg/bindings/images/build_unix.go new file mode 100644 index 000000000..0afb1deb6 --- /dev/null +++ b/pkg/bindings/images/build_unix.go @@ -0,0 +1,16 @@ +// +build !windows + +package images + +import ( + "os" + "syscall" +) + +func checkHardLink(fi os.FileInfo) (devino, bool) { + st := fi.Sys().(*syscall.Stat_t) + return devino{ + Dev: uint64(st.Dev), + Ino: uint64(st.Ino), + }, st.Nlink > 1 +} diff --git a/pkg/bindings/images/build_windows.go b/pkg/bindings/images/build_windows.go new file mode 100644 index 000000000..bd71d1bf0 --- /dev/null +++ b/pkg/bindings/images/build_windows.go @@ -0,0 +1,9 @@ +package images + +import ( + "os" +) + +func checkHardLink(fi os.FileInfo) (devino, bool) { + return devino{}, false +} diff --git a/test/system/070-build.bats b/test/system/070-build.bats index d2d56c051..9e1559013 100644 --- a/test/system/070-build.bats +++ b/test/system/070-build.bats @@ -766,6 +766,26 @@ EOF is "$output" ".*/tmp/bogus: no such file or directory" } +@test "podman build COPY hardlinks " { + tmpdir=$PODMAN_TMPDIR/build-test + mkdir -p $tmpdir + + dockerfile=$tmpdir/Dockerfile + cat >$dockerfile <<EOF +FROM $IMAGE +COPY . /test +EOF + ln $dockerfile $tmpdir/hardlink + + run_podman build -t build_test $tmpdir + run_podman run --rm build_test stat -c '%i' /test/Dockerfile + dinode=$output + run_podman run --rm build_test stat -c '%i' /test/hardlink + is "$output" "$dinode" "COPY hardlinks work" + + run_podman rmi -f build_test +} + function teardown() { # A timeout or other error in 'build' can leave behind stale images # that podman can't even see and which will cascade into subsequent |